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use crate::mesh::*;
use crate::Error;
impl Mesh {
pub fn is_valid(&self) -> Result<(), Error> {
for vertex_id in self.vertex_iter() {
if let Some(halfedge_id) = self.walker_from_vertex(vertex_id).halfedge_id() {
if !self.halfedge_iter().any(|he_id| he_id == halfedge_id) {
Err(Error::MeshIsInvalid(format!(
"Vertex {} points to an invalid halfedge {}",
vertex_id, halfedge_id
)))?;
}
if self
.walker_from_vertex(vertex_id)
.as_twin()
.vertex_id()
.unwrap()
!= vertex_id
{
Err(Error::MeshIsInvalid(format!("Halfedge {} pointed to by vertex {} does not start in that vertex, but instead in {}", self.walker_from_vertex(vertex_id).halfedge_id().unwrap(), vertex_id, self.walker_from_vertex(vertex_id).as_twin().vertex_id().unwrap())))?;
}
} else {
Err(Error::MeshIsInvalid(format!(
"Vertex {} does not point to a halfedge",
vertex_id
)))?;
}
}
for halfedge_id in self.halfedge_iter() {
let walker = self.walker_from_halfedge(halfedge_id);
if let Some(twin_id) = walker.twin_id() {
if !self.halfedge_iter().any(|he_id| he_id == twin_id) {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to an invalid twin halfedge {}",
halfedge_id, twin_id
)))?;
}
if self.walker_from_halfedge(twin_id).twin_id().unwrap() != halfedge_id {
Err(Error::MeshIsInvalid(format!(
"Halfedge twin pointed to by halfedge {} does not point back to halfedge",
halfedge_id
)))?;
}
if self.walker_from_halfedge(twin_id).vertex_id() == walker.vertex_id() {
Err(Error::MeshIsInvalid( format!("Invalid orientation: The halfedge {} and its twin halfedge {} points to the same vertex {}", halfedge_id, twin_id, walker.vertex_id().unwrap())))?;
}
} else {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} does not point to a twin halfedge",
halfedge_id
)))?;
}
if let Some(vertex_id) = walker.vertex_id() {
if !self.vertex_iter().any(|vid| vid == vertex_id) {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to an invalid vertex {}",
halfedge_id, vertex_id
)))?;
}
} else {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} does not point to a vertex",
halfedge_id
)))?;
}
if let Some(face_id) = walker.face_id() {
if !self.face_iter().any(|fid| fid == face_id) {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to an invalid face {}",
halfedge_id, face_id
)))?;
}
if walker.next_id().is_none() {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to a face but not a next halfedge",
halfedge_id
)))?;
}
}
if let Some(next_id) = walker.next_id() {
if !self.halfedge_iter().any(|he_id| he_id == next_id) {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to an invalid next halfedge {}",
halfedge_id, next_id
)))?;
}
if walker.face_id().is_none() {
Err(Error::MeshIsInvalid(format!(
"Halfedge {} points to a next halfedge but not a face",
halfedge_id
)))?;
}
if self.walker_from_halfedge(next_id).previous_id().unwrap() != halfedge_id {
Err(Error::MeshIsInvalid(format!(
"Halfedge next pointed to by halfedge {} does not point back to halfedge",
halfedge_id
)))?;
}
}
if self.edge_length(halfedge_id) < 0.00001 {
Err(Error::MeshIsInvalid(format!(
"Length of edge {} is too small ({})",
halfedge_id,
self.edge_length(halfedge_id)
)))?;
}
}
for face_id in self.face_iter() {
if let Some(halfedge_id) = self.walker_from_face(face_id).halfedge_id() {
if !self.halfedge_iter().any(|he_id| he_id == halfedge_id) {
Err(Error::MeshIsInvalid(format!(
"Face {} points to an invalid halfedge {}",
face_id, halfedge_id
)))?;
}
if self.walker_from_face(face_id).face_id().unwrap() != face_id {
Err(Error::MeshIsInvalid(format!(
"Halfedge pointed to by face {} does not point to back to face",
face_id
)))?;
}
} else {
Err(Error::MeshIsInvalid(format!(
"Face {} does not point to a halfedge",
face_id
)))?;
}
if self.face_area(face_id) < 0.00001 {
Err(Error::MeshIsInvalid(format!(
"Area of face {} is too small ({})",
face_id,
self.face_area(face_id)
)))?;
}
}
for vertex_id1 in self.vertex_iter() {
for vertex_id2 in self.vertex_iter() {
if self.connecting_edge(vertex_id1, vertex_id2).is_some()
!= self.connecting_edge(vertex_id2, vertex_id1).is_some()
{
Err(Error::MeshIsInvalid(format!(
"Vertex {} and Vertex {} is connected one way, but not the other way",
vertex_id1, vertex_id2
)))?;
}
let mut found = false;
for halfedge_id in self.vertex_halfedge_iter(vertex_id1) {
if self.walker_from_halfedge(halfedge_id).vertex_id().unwrap() == vertex_id2 {
if found {
Err(Error::MeshIsInvalid(format!(
"Vertex {} and Vertex {} is connected by multiple edges",
vertex_id1, vertex_id2
)))?;
}
found = true;
}
}
}
}
Ok(())
}
}